Hot air blower



Pep. 23, 1932. A, S lcKL Y 1,846,158

HOT AIR BLOWER Filed NOV. 10, 1928 Z I c? .2. 7 2 7 l j Z 3 1 N VEN TOR.

Erika/L JZz'c/Hg Y ATTORNEY.

Patented Feb. 23, 1932 UNITED STATES PATENT OFFICE ARTHUR LEWIS STICKLEY, OF OSCEOLA, INDIANA, ASSIGNOR OF ONE-HALF TO JAMES B. COLEMAN, OF SOUTH BEND, INDIANA HOT AIR BLOWER Application filed November 10, 1928. Serial No. 318,543.

The invention relates to hot air blowers, particularly to blowers used for drying newly printed matter, and has for its object to provide a device of this character adapted to be suspended over the delivery table of a printing press whereby a current of hot air is directed downwardly on the newly printed matter to dry the same and prevent the ink from smearing.

A further object is to provide a device of this character in which means are provided for adjustably regulating the area and location of the outlet opening for various sizes and positions of specific printed matter on a sheetof paper, or to produce and direct an intensified stream of hot air on aheavily inked portion, as an article illustrating cut.

A further object is to provide a device of this character in which the amount of heat generated can be controlled as needed.

A further object is to provide a device of this character in which the heated air is directed through a restricted outlet constructed on the principle of a nozzle whereby a concentrated stream of hot air is discharged from the device and directed on the object to be dried with considerable velocity.

With the above and other objects in view, the invention resides in the combination and arrangement of parts as hereinafter set forth, shown in the drawings, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawings:

Figure 1 is a longitudinal vertical sectional view of the device, taken on line 11 of Figure 3.

Figure 2 is a side View of the device.

Figure 3 is a top plan view of the device.

Figure 4 is a horizontal sectional view of the device, taken on line 44 of Figure 1.

Referring to the drawings, the numeral 1 design ates a casing, which is preferably made of sheet metal, and which is adapted to be suspended from the ceiling or from some support by means of chains or wires 2, to which suitable means, such as the eyelets 3 carried by the casing, are adapted to be secured. The casing 1 is preferably rectangular in horizontal section, having its sides 4 and 5 downwardly and outwardly diverging, and having its lower end walls 6 downwardly and inwardly converging for purposes to be presently set forth. An air intake opening 7 is provided in the top of the casing, and directly beneath this opening is disposed a fan 8 operated by an electric motor 9, said motor and fan being supported by the radial supporting members 10 extending across the opening 7, said members being preferably integrally formed with the casing and connected together at their inner ends. At the bottom of the casing is formed the restricted outlet 11, the opposite side walls of which are preferably longitudinally grooved to form guides, as at 12, said guides 12 being adapted to receive slide members 13 longitudinally slidable in said guides and preferably of unequal length, the purpose of the unequal length thereof being hereinafter set forth.

Intermediate the fan 8 and the outlet 11, and secured to the opposite sides of the casing 1, preferably between the portions 1 and 5 thereof. are spaced parallel rods 14 which carry the spaced transverse rods 15. The transverse rods 15 carry spaced longitudinal insulating rods 16 around which are wound high resistance wires 17 which form the heating elements. The wires 17 preferably form parts of a plurality of electric circuits adapted to be controlled by the switches 18 for pur poses to be hereinafter set forth.

The fan 8 draws air through the intake opening 7 and blows it downwardly through the casing. As the air passes the heating elements it is heated, the hot air then passing through. the outlet 11. The heating elements are preferably disposed in the enlarged por tion of the casing 1, as shown, thus permitting relatively large heating elements to be used. The provision of a plurality of heating circuits permits of regulation of the amount of heat generated, so that for drying small pieces requiring but little hot air only a small amount of heat need be generated, and vice versa.

' In the lower portion of the casing the converging lower end walls are constructed on the principle of a nozzle, and direct the heat passing through the outlet in a concentrated stream. The diverging side walls of said nozzle end allow the air to have a wide spread, so that a wide and relatively thin air stream is discharged through said outlet. The slid members 13, slidable in the guides 12, form means for adjusting the width of the air current discharged and for directing the air current toward the desired location, Furthermore by adjusting the size of the outlet opening, air streams of different degrees of temperature and velocity may be provided, since the air passing through a small opening will be hotter than that passing through a larger opening when the same amount of heat is applied. It will also be seen that by the use of the interchangeably disposed anc adjustable members 13 of unequal lengths, the discharge of the air stream to one side or the other or centrally of the nozzle may be provided.

From the above it will be seen that a device for drying purposes is provided which is simple in construction and operation, adjustable to obtain the requisite amount and discharge position of hot air therefrom, and one which is well adapted for its purpose.

The invention having been set forth, what isclaimed as new and useful is:

1. In a hot air blower, a casing having an intake and an outlet, means for forcing a curof air through said casing, means for hea lng said air current, depending flanges carrier by said casing on opposite sides of said out-let and terminating in inwardly bent flanges-to form guideways, and closure members slidably mounted in said guideways.

2. In a l intake and an outlet, means for forcing a current of air through said casing, means for heating said air current, said casing having an increasing cross sectional area fromthe intake to the heating section thereof, and a de creasing cross sectional area from the heating section to the discharge outlet thereof, and means controlling the area of said discharge opening. 7

3. in a hot air blower, a casing having an intake and outlet, means for forcing an air stream through said casing, means disposed in said casing for heating said air stream, the cross sectional area of said casing being greatest at the heating section thereof and decreasing therefro-in toward the intake and outlet ends thereof,depending flanges carried by said casing on opposite sides of said outstream through said casing, means disposed V in said casing for heating said air stream, the

cross sectional area of said casing being greatiot air blower, a casing having an in said casing for heating said air stream, the

cross sectional area of said casing being greatest at the heating section thereof and decreasing therefrom to the intake and outlet ends thereof, and-members slidablycarried by said casing adapted to adjustably control the area of said outlet and the direction of discharge of said air stream.

In testimony whereof I aflix mysignature.

ARTHUR LEWIS STICKLEY. 

